<template>
  <div>
    <img :src="options.img" title="点击上传图片" class="img-circle img-lg" @click="editCropper()" />
    <el-dialog :title="title" :visible.sync="open" width="800px" append-to-body @opened="modalOpened">
      <el-row>
        <el-col :xs="24" :md="12" :style="{height: '350px'}">
          <vue-cropper
            ref="cropper"
            :img="options.img"
            :info="true"
            :autoCrop="options.autoCrop"
            :autoCropWidth="options.autoCropWidth"
            :autoCropHeight="options.autoCropHeight"
            :fixedBox="options.fixedBox"
            @realTime="realTime"
            v-if="visible"
          />
        </el-col>
        <el-col :xs="24" :md="12" :style="{height: '350px'}">
          <div class="avatar-upload-preview">
            <img :src="previews.url" :style="previews.img" />
          </div>
        </el-col>
      </el-row>
      <br />
      <el-row>
        <el-col :lg="2" :md="2">
          <el-upload action="#" :http-request="requestUpload" :show-file-list="false" :before-upload="beforeUpload">
            <el-button size="small">
              上传
              <i class="el-icon-upload el-icon--right"></i>
            </el-button>
          </el-upload>
        </el-col>
        <el-col :lg="{span: 1, offset: 2}" :md="2">
          <el-button icon="el-icon-plus" size="small" @click="changeScale(1)"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button icon="el-icon-minus" size="small" @click="changeScale(-1)"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button icon="el-icon-refresh-left" size="small" @click="rotateLeft()"></el-button>
        </el-col>
        <el-col :lg="{span: 1, offset: 1}" :md="2">
          <el-button icon="el-icon-refresh-right" size="small" @click="rotateRight()"></el-button>
        </el-col>
        <el-col :lg="{span: 2, offset: 6}" :md="2">
          <el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script>
import { VueCropper } from 'vue-cropper'
import { upload } from '@/api/upload'

export default {
  name: 'UploadImage',
  components: { VueCropper },
  props: {
    image: undefined
  },
  data() {
    return {
      // 是否显示弹出层
      open: false,
      // 是否显示cropper
      visible: false,
      // 弹出层标题
      title: '裁剪图片',
      options: {
        img: this.image, // 裁剪图片的地址
        autoCrop: true, // 是否默认生成截图框
        autoCropWidth: 200, // 默认生成截图框宽度
        autoCropHeight: 200, // 默认生成截图框高度
        fixedBox: true // 固定截图框大小 不允许改变
      },
      previews: {}
    }
  },
  methods: {
    // 编辑头像
    editCropper() {
      this.open = true
    },
    // 打开弹出层结束时的回调
    modalOpened() {
      this.visible = true
    },
    // 覆盖默认的上传行为
    requestUpload() {
    },
    // 向左旋转
    rotateLeft() {
      this.$refs.cropper.rotateLeft()
    },
    // 向右旋转
    rotateRight() {
      this.$refs.cropper.rotateRight()
    },
    // 图片缩放
    changeScale(num) {
      num = num || 1
      this.$refs.cropper.changeScale(num)
    },
    // 上传预处理
    beforeUpload(file) {
      if (file.type.indexOf('image/') === -1) {
        this.$message({
          message: '文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。',
          type: 'warning'
        })
      } else {
        const reader = new FileReader()
        reader.readAsDataURL(file)
        reader.onload = () => {
          this.options.img = reader.result
        }
      }
    },
    // 上传图片
    uploadImg() {
      this.$refs.cropper.getCropBlob(data => {
        const formData = new FormData()
        formData.append('file', data)
        console.log(formData)
        upload(formData).then(response => {
          this.open = false
          this.options.img = process.env.VUE_APP_BASE_API + response.data
          this.visible = false
        })
      })
    },
    // 实时预览
    realTime(data) {
      this.previews = data
    }
  }
}
</script>

<style lang="less">
.info {
  width: 720px;
  margin: 0 auto;
  .oper-dv {
    height:20px;
    text-align:right;
    margin-right:100px;
    a {
      font-weight: 500;
      &:last-child {
        margin-left: 30px;
      }
    }
  }
  .info-item {
    margin-top: 15px;
    label {
      display: inline-block;
      width: 100px;
      text-align: right;
    }
    .sel-img-dv {
      position: relative;
      .sel-file {
        position: absolute;
        width: 90px;
        height: 30px;
        opacity: 0;
        cursor: pointer;
        z-index: 2;
      }
      .sel-btn {
        position: absolute;
        cursor: pointer;
        z-index: 1;
      }
    }
  }
}

.cropper-content{
  display: flex;
  display: -webkit-flex;
  justify-content: flex-end;
  -webkit-justify-content: flex-end;
  .cropper{
    width: 260px;
    height: 260px;
  }
  .show-preview{
    flex: 1;
    -webkit-flex: 1;
    display: flex;
    display: -webkit-flex;
    justify-content: center;
    -webkit-justify-content: center;
    .preview{
      overflow: hidden;
      border-radius: 50%;
      border:1px solid #cccccc;
      background: #cccccc;
      margin-left: 40px;
    }
  }
}
.cropper-content .show-preview .preview {margin-left: 0;}

</style>
